Harrow.



No. 897,150. PATENTED AUG. 25. 1908.

J. E. ROBINSON.

HARROW.

APPLICATION FILED APR.28, 190B.

2 SHEETS-SHEET 1.

IIIII III-III lllll A PATENTED AUG. 25, 1908.

2 SHEETS-SHEET}.

J. E. ROBINSON. HARROW. APPLIOATION FILED APR.28, 1908.

j'AMES ED ROBINSON, OF FAYETTEVILLE, TENNESSEE.

'HARROW.

I Specification of Letters Patent.

Application filed. April 2a, 1908. Serial No. 429,632.

To all whom it may concern:

Be it known that 1, Limits En ROBINSON, a citizen of the United States, residing at Fayettevillc, in the county of Lincoln and State of Tennessee, have invented-new and useful Improvements in Harrows, of which the following is a specification.

This invention relates to harrows, the object of the invention being to provide an effective harrow and clod crusher and cutter, the machine embodying a plurality of alternating clod cutters or slicers which travel in advance of the drag or ordinary harrow and break up the larger particles or clods, thereby rendering the harrow more effective of dis'integrating or breaking up the soil.

The invention consists in themovel construction, combination and arrangement herein fully described, illustrated and claimed. In the-accompanying drawings :Figure 1 is a side elevation of a harrow embodying the present invention. Fig. 2 is a vertical longitudinal section through the same. Fig. 3 is a plan view. of the machine. Fig. 4 is a vertical cross section through the machine taken in rear of the clod cutters.

The machine embodies a mainframe composed of parallel side bars 1 and 2 and a plu-.

rality of cross bars 3, 4 and 5 connecting the same the said frame being mounted upon forward and rear carrying wheels 6 and 7, respectively. The front wheels 6 are mounted on the forward axle 8 towhich is connected a draft pole or tongue 9.

Therear wheels 7 which tion wheels are mounted fast on. acrank axle 10 which is provided with a plurality of oppositely set cranks 11 and 12 for a purpose which will hereinafter appear. I

In connection with the main frame above described, I employ a swing frame embodying .oppos'itel arranged bars 13 journaled at their forwar ends on the crank axle 10 as indicated by dotted lines in Fig. 3. Adjacent to their free ends, the bars 13 carry a fulcrum bar or rod 14'upon which is mounted aplurality 'of lever arms 15 each of-which c rries'at'its lower end a clod cutter or'slicer 16 in the form of a two edged blade.

are in reality trim The upper extremities of the lever arms 15 have pivotally connected thereto forwardly extending links or connecting rods -17 the.

forward ends of which are operatively connected with the cranks 11 and 12 of the "crank axle 10 under the alternate arrange- -ment shown in the plan v1ew,'F1g. 3. In

other words, the lever arms 15 are set to operate alternately and simultaneously in opposite directions as clearly indicated "by the disposition of the cranks 11 and 12 in Fig. 3. Thus the knives or cutters 16 operate with a positive action to break up the clods in 'advance of the usual drag harrow shown at 18 which is drawn alon in rear of the machine above described, eing connected thereto by one or more chams 19.

' Patented Aug. 25, 1908.

The swing frame which carries the cutters 16 is rendered adjustable up and down as follows. 20 designates a thumb latch lever which is fulcrumed at 21 on the machine'- frame within reach of the driver in the seat 22 said lever operating in'connectio'n with a holding rack 23. The fulcrum of the lever consists of a rock shaft provided with a plurality of crank arms 24 om which connectedfon a square shaft 27 journ'aled in bearings 28 on the main frame. of said bell crank levers spring connections 29 extend downward to the rear ends of the bars 13 of the swing frame so that by movingthe thumb latch lever 20, the'cutters 16 may be raised and lowered to suit conditions. Each of the connections 29 preferably embodies a spring cock-eye 30 to ada t the swing frame to yield readily to obstaclias and on, a swing frame, afulcrum rod on said swing frame, and oscillatory clod cutters mg-rods 25 extend back and have a jointed. connection with bell crank levers 26 mount-3 a wheeled frame, a crank axle having a traction wheel fast there- From the lower arms as r thereby prevent inilury to the cutters. '31

.journaled on said'rod'and eperatively connected with the crank axle in such manner that alternate. cutters are simultaneously moved in opposite directions.

2. A barrow comprising a Wheeled frame, a crank axle having a traction Wheel fast thereon, a swing frame, a fulcrum rod on said swin frame, oscillatory 010d cutters journaled on said rod and operatively connected with the crank axle in such manner that sumac alternate cutters are simultanecusly moved 10 in opposite directions, and means for raising arid lowering said swing frame.

In testimony whereof I aflix my signature in presence of two Witnesses. v JAMES ED ROBINSON. Witnesses:

J. F. TAYLOR, F. O.- ALLISON. 

